"(Loss-prevention officers at the store) discovered that the cashier was not ringing up all the items and was voiding a lot of items that were coming through there," Port St. Lucie police spokesman Sgt. Frank Sabol said. "It was over a certain number of days over a few months, and it was just with one particular customer."

Police said the father-daughter duo admitted to the thefts.

"There were some big-ticket items," Sabol said. "I think the total in February alone was over $1,200."

Sabol added that investigators are checking to see if there were more thefts in January or December.